Reflecting triangles for road emergencies (North Austin)

Four reflecting triangles, for use in case of breakdown.
The black bases are somewhat heavy, so they have a better shot at staying in place as vehicles or breezes pass by.
Three of them fit in the red box/case.
Located in north Austin near Metric and Parmer.
If you see this ad, they are available.
If you text about them, please state which ad you are looking at, since it is likely I am advertising several things.